html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  margin: 0;
  padding: 0;
  user-select: none;
  color: #111;
  font-family: serif;
}

body {
  background-color: #f0f0f0;
  cursor: pointer;
  background-size: cover;
  background-position: center center;
  background-image: url(1.png);
}

#app {
  width: 100%;
  height: 100%;
}

#stage {
  backface-visibility: visible;
}

#download-button {
  position: absolute;
  bottom: 0;
  left: 0;
  padding: 10px;
  display: inline-block;
  margin: 10px;
  background-color: #f0f0f0;
  color: #303030;
  border-radius: 4px;
  cursor: pointer;
  border-bottom: solid 3px #f0f0f0;
}
#download-button:hover {
  border-bottom: solid 3px #d7d7d7;
}